In accordance with the new writing given for Law n 8004, of 1990, the Art. 9 dodecahedra-Law n. 2164 of 1984, started to invigorate integument form: the monthly installments of financing contracts affirmation scope of the SFH, tied with the Wage equivalence Plan for Professionalization (PES/CP) will be readjusted in the following month to the month where to occur data-base of the professional category of the borrower being used itself it variation don dice of Prices to Consumerism (IPC) refined in respective the date-base. Already the paragraph 5 passed to indeterminate that the monthly installments not Demonstration I Conversion of nominal tax of interests for jurors festival tax This mathematical mechanism is one of more frequent armadillos found in contracts of real estate financing. Generalissimos contracts is elaborated and divulged with nominal tax, but the Effective Interests are utilization Price Table. Therefore, the tax must be converted nominal para tax of interests accomplishes. For if dealing with a tax of interests nominal annual, individualize it for 12, and after that for 100. To become it a tax it accomplishes, below uses the resultant one in the first operation in the formula..